‌Genuine Sinotruk HOWO A7 Brake Return Spring WG9981341005 - OEM Clutch/Brake Pedal Return Spring Kit

Genuine Sinotruk HOWO A7 Brake Pedal Return Spring (Part No. WG9981341005)‌

This OEM ‌return spring‌ provides positive pedal reset for HOWO A7 brake and clutch systems. It eliminates pedal free-play, prevents partial brake engagement, and maintains correct release clearance for S-cam brakes under heavy-duty cycling.

‌Technical Specifications‌:

• ‌Part Number‌: WG9981341005 (2024 upgraded material version)
• ‌Compatibility‌: HOWO A7 T7H/T5G series with Knorr-Bremse/WABCO brake systems (2017-Present)
• ‌Spring Type‌: Double torsion coil spring
• ‌Wire Diameter‌: 4.5mm
• ‌Outer Diameter‌: 38mm
• ‌Free Length‌: 120mm
• ‌Preload Force‌: 120N ±10%
• ‌Max Extension‌: 180mm (without permanent deformation)
• ‌Material‌: DIN 17223-C class steel (chrome-silicon alloy)
• ‌Finish‌: Electrophoretic coating (black)
• ‌Operating Temp‌: -40°C to +180°C
• ‌Cycles‌: Rated >500,000 cycles
• ‌Certifications‌: ISO 10243, ECE R13, Sinotruk TS-QC-5205

‌Performance Advantages‌:
Consistent Tension‌: Precision-wound coils maintain force within 5% throughout lifespan
Corrosion Resistance‌: Salt spray tested >1000 hours
Heat Resistance‌: Stable at brake drum temperatures
Vibration Proof‌: Anti-resonance coil design
Easy Installation‌: Color-coded ends for orientation

‌Why Genuine OEM?‌

• Prevents brake drag (saves 3% fuel consumption)
• Matches factory pedal resistance feel
• 50% longer service life vs aftermarket springs
• Maintains ABS/ESC system calibration
• 2-year unlimited mileage warranty

‌Risk Warning‌:
 Non-OEM springs cause:

• Delayed brake release (leading to rotor warping)
• Increased stopping distances (+15%)
• Accelerated master cylinder wear

‌Installation Criticals‌:

• Pre-stretch to 150mm before installation
• Lubricate with high-temp silicone grease (included)
• Torque mounting bracket: 25Nm
• Requires pedal free play adjustment post-installation